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2009 Mar 06
3
PCA and categorical data
Hi all,
I' m trying to figure out if it is appropriate to do a PCA having only categorical data (not ordinal). I have only find the following quote:
One method to find such relationships is to select appropriate variables and
to view the data using a method like Principle Components Analysis (PCA) [4].
This approach gives us a clear picture of the data using KL-plot of the PCA.
However, the